NSEA Practice Questions - National Standard Examination In Astronomy Exam

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A satellite is in a circular orbit around Earth at an altitude equal to Earth's radius $R_E$. If the orbital speed of a satellite near the Earth's surface is $v_0 \approx 7.9\text{ km/s}$, what is the orbital speed of this satellite?

3.95 km/s 5.59 km/s 7.90 km/s 11.17 km/s

Correct Answer:

5.59 km/s

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